/* 
   Hızlı Fiş - Core Stylesheet
   Theme: Enterprise B2B SaaS, Professional, Calm
*/

:root {
    /* Brand Colors */
    --brand-primary: #0A192F; /* Very deep slate/navy - Trustworthy */
    --brand-primary-light: #172A45;
    --brand-accent: #2563EB; /* Practical robust blue for active elements */
    --brand-accent-hover: #1D4ED8;
    
    /* Backgrounds */
    --bg-main: #FFFFFF;
    --bg-gray: #F8FAFC;
    --bg-gray-dark: #F1F5F9;
    --bg-dark: #111827;
    --bg-darker: #0B0F19;
    
    /* Text */
    --text-main: #1E293B;
    --text-muted: #475569;
    --text-white: #FFFFFF;
    --text-white-muted: #94A3B8;
    
    /* UI Elements */
    --border-light: #E2E8F0;
    --border-focus: #94A3B8;
    
    /* Status Colors */
    --success-green: #059669;
    --success-bg: #D1FAE5;
    --warning-amber: #D97706;
    --warning-bg: #FEF3C7;

    /* Layout & Type */
    --font-stack: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --content-width: 1140px;
}

/* =========================================
   Reset & Base
   ========================================= */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-stack);
    color: var(--text-main);
    background-color: var(--bg-main);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.2s ease;
}

img {
    max-width: 100%;
    display: block;
}

/* =========================================
   Typography & Utilities
   ========================================= */
h1, h2, h3, h4, h5, h6 {
    color: var(--brand-primary);
    line-height: 1.2;
    font-weight: 700;
}

.text-center { text-align: center; }
.text-right { text-align: right; }
.text-blue { color: var(--brand-accent); }
.text-white { color: var(--text-white) !important; }
.text-white-muted { color: var(--text-white-muted); }
.text-success { color: var(--success-green); }
.text-sm { font-size: 0.875rem; }
.fw-600 { font-weight: 600; }

/* Spacing */
.mt-lg { margin-top: 2rem; }
.mt-xl { margin-top: 4rem; }
.mb-sm { margin-bottom: 0.5rem; }
.mb-md { margin-bottom: 1.5rem; }
.mb-lg { margin-bottom: 3rem; }

.pt-xl { padding-top: 5rem; }
.pb-md { padding-bottom: 3rem; }
.pb-lg { padding-bottom: 5rem; }
.py-xl { padding-top: 5rem; padding-bottom: 5rem; }

/* Backgrounds */
.bg-gray { background-color: var(--bg-gray); }
.bg-dark { background-color: var(--bg-dark); }
.bg-darker { background-color: var(--bg-darker); }
.bg-blue { background-color: var(--brand-primary); }

/* Layout Blocks */
.container {
    width: 100%;
    max-width: var(--content-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

.grid {
    display: grid;
    gap: 2rem;
}
.grid-half { grid-template-columns: 1fr 1fr; }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.align-center { align-items: center; }
.gap-lg { gap: 4rem; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.justify-center { display: flex; justify-content: center; align-items: center; gap: 1rem; }

.shadow-sm { box-shadow: 0 1px 3px rgba(0,0,0,0.1); }
.shadow-md { box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1); }
.shadow-lg { box-shadow: 0 10px 15px -3px rgba(0,0,0,0.1); }
.shadow-2xl { box-shadow: 0 25px 50px -12px rgba(0,0,0,0.25); }
.border-bottom { border-bottom: 1px solid var(--border-light); }
.border-top { border-top: 1px solid var(--border-light); }
.border-dark { border-color: rgba(255,255,255,0.1); }

/* =========================================
   Buttons
   ========================================= */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.6rem 1.25rem;
    font-size: 0.95rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.2s ease;
    border: 1px solid transparent;
}

.btn-lg {
    padding: 0.8rem 1.75rem;
    font-size: 1.05rem;
}

.btn-sm {
    padding: 0.4rem 0.8rem;
    font-size: 0.85rem;
}

.btn-primary {
    background-color: var(--brand-accent);
    color: var(--text-white);
}

.btn-primary:hover {
    background-color: var(--brand-accent-hover);
    transform: translateY(-1px);
}

.btn-primary.btn-white {
    background-color: var(--text-white);
    color: var(--brand-primary);
    font-weight: 600;
}

.btn-primary.btn-white:hover {
    background-color: var(--bg-gray);
}

.btn-secondary {
    background-color: var(--bg-gray-dark);
    color: var(--brand-primary);
    border: 1px solid var(--border-light);
}

.btn-secondary:hover {
    background-color: var(--border-light);
}

.btn-outline-light {
    background-color: transparent;
    color: var(--text-white);
    border: 1px solid rgba(255,255,255,0.3);
}

.btn-outline-light:hover {
    border-color: var(--text-white);
    background-color: rgba(255,255,255,0.05);
}

/* =========================================
   Navbar
   ========================================= */
.navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border-light);
    padding: 1rem 0;
}

.navbar-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--brand-primary);
}

.logo i {
    font-size: 1.5rem;
    color: var(--brand-accent);
}

.logo-white i, .logo-white span {
    color: var(--text-white);
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    color: var(--text-muted);
    font-weight: 500;
    font-size: 0.95rem;
}

.nav-links a:hover {
    color: var(--brand-primary);
}

/* =========================================
   Hero Section
   ========================================= */
.hero {
    overflow: hidden;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: 3.5rem;
    letter-spacing: -0.02em;
    margin-bottom: 1.5rem;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
    max-width: 650px;
    margin-left: auto;
    margin-right: auto;
}

.hero-visual {
    background-color: var(--bg-main);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    max-width: 700px;
    margin: 4rem auto 0;
    overflow: hidden;
    text-align: left;
}

.ui-header {
    background: var(--bg-gray);
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border-light);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-muted);
}

.ui-status i {
    color: var(--brand-accent);
}

.spin {
    animation: spin 2s linear infinite;
}

@keyframes spin { 100% { transform: rotate(360deg); } }

.ui-skeleton {
    padding: 1.5rem;
}

.sk-row {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
    padding: 0.5rem;
    border-radius: var(--radius-sm);
}

.sk-row.active {
    background-color: var(--success-bg);
}

.sk-col {
    height: 12px;
    background-color: var(--border-light);
    border-radius: 4px;
}

.sk-col.small { flex: 1; }
.sk-col.med { flex: 2; }
.sk-col.large { flex: 4; }
.sk-col.highlight { background-color: var(--success-green); }

/* =========================================
   Problem Section
   ========================================= */
.section-header {
    max-width: 600px;
    margin: 0 auto 3rem;
}

.section-title {
    font-size: 2.25rem;
    margin-bottom: 1rem;
}

.section-desc {
    font-size: 1.1rem;
    color: var(--text-muted);
}

.card {
    background-color: var(--bg-main);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    padding: 2rem;
    transition: transform 0.2s ease;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(0,0,0,0.05);
}

.card-problem .card-icon {
    font-size: 2rem;
    color: var(--brand-accent);
    margin-bottom: 1rem;
    background-color: var(--brand-secondary);
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
}

.card-problem h3 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.card-problem p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* =========================================
   Solution & Process
   ========================================= */
.process-flow {
    display: flex;
    justify-content: space-between;
    position: relative;
}

.step {
    flex: 1;
    text-align: center;
    position: relative;
    z-index: 2;
    padding: 0 1rem;
}

.step-number {
    width: 32px;
    height: 32px;
    background-color: var(--brand-primary);
    color: var(--text-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    margin: 0 auto 1.5rem;
    font-size: 0.9rem;
}

.step-icon {
    font-size: 2.5rem;
    color: var(--brand-primary);
    margin-bottom: 1rem;
}

.step-title {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.step-desc {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.step-connector {
    flex: 0 0 50px;
    position: relative;
}

.step-connector::after {
    content: '';
    position: absolute;
    top: 16px;
    left: -25%;
    right: -25%;
    height: 2px;
    background: repeating-linear-gradient(90deg, var(--border-light) 0, var(--border-light) 6px, transparent 6px, transparent 12px);
    z-index: 1;
}

/* =========================================
   Product UI Section (The main mockup)
   ========================================= */
.ui-mockup {
    background-color: var(--bg-main);
    border-radius: var(--radius-lg);
    overflow: hidden;
    color: var(--text-main);
}

.ui-mockup-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    background-color: var(--bg-gray);
}

.mockup-tabs {
    display: flex;
    gap: 1.5rem;
}

.mockup-tabs .tab {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-muted);
    cursor: pointer;
    position: relative;
    padding-bottom: 1.1rem;
    margin-bottom: -1rem;
}

.mockup-tabs .tab.active {
    color: var(--brand-primary);
}

.mockup-tabs .tab.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background-color: var(--brand-accent);
}

.ui-table-container {
    width: 100%;
    overflow-x: auto;
}

.ui-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

.ui-table th {
    background-color: var(--bg-main);
    color: var(--text-muted);
    font-weight: 500;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 1rem 1.5rem;
    border-bottom: 2px solid var(--border-light);
}

.ui-table td {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border-light);
    font-size: 0.95rem;
    vertical-align: middle;
}

.ui-table tr:hover {
    background-color: var(--bg-gray);
}

.row-approved {
    background-color: var(--bg-gray-dark);
}

.row-approved:hover {
    background-color: var(--bg-gray-dark);
}

.row-approved td {
    color: var(--text-muted);
}

.select-wrapper {
    position: relative;
}

.gl-select {
    width: 100%;
    padding: 0.5rem;
    border: 1px solid var(--border-focus);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-family: inherit;
    color: var(--text-main);
    background-color: var(--bg-gray);
    outline: none;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%2364748B' viewBox='0 0 256 256'%3E%3Cpath d='M213.66,101.66l-80,80a8,8,0,0,1-11.32,0l-80-80A8,8,0,0,1,53.66,90.34L128,164.69l74.34-74.35a8,8,0,0,1,11.32,11.32Z'%3E%3C/path%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.5rem center;
    cursor: pointer;
}

.gl-select:focus {
    border-color: var(--brand-accent);
    box-shadow: 0 0 0 2px rgba(37,99,235,0.2);
}

.approved-state {
    padding: 0.5rem 0;
    font-weight: 500;
}

.badge {
    display: inline-block;
    padding: 0.25rem 0.6rem;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 600;
}

.badge-high {
    background-color: var(--success-bg);
    color: var(--success-green);
}

.badge-med {
    background-color: var(--warning-bg);
    color: var(--warning-amber);
}

.btn-action {
    background: none;
    border: 1px solid var(--border-light);
    border-radius: var(--radius-sm);
    padding: 0.4rem;
    color: var(--text-muted);
    cursor: pointer;
    margin-left: 0.25rem;
    transition: all 0.2s;
}

.btn-action:hover {
    background-color: var(--bg-gray-dark);
    color: var(--text-main);
}

.btn-approve {
    color: var(--success-green);
    border-color: var(--success-green);
    background-color: var(--success-bg);
}

.btn-approve:hover {
    background-color: var(--success-green);
    color: white;
}

/* =========================================
   Trust Section
   ========================================= */
.feature-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.feature-list li {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
}

.feature-list i {
    color: var(--success-green);
    font-size: 1.25rem;
    margin-top: 0.15rem;
}

.trust-image {
    display: flex;
    justify-content: center;
}

.shield-graphic {
    font-size: 12rem;
    color: var(--brand-secondary);
    position: relative;
}

.shield-graphic i {
    background: linear-gradient(135deg, var(--brand-primary-light), var(--brand-primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* =========================================
   Value & Target Users Section
   ========================================= */
.card-value {
    background-color: var(--brand-primary);
    color: var(--text-white);
    border: none;
}

.card-value .section-title {
    color: var(--text-white);
}

.benefit-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-top: 2rem;
}

.benefit-list li {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.benefit-icon {
    background-color: rgba(255,255,255,0.1);
    color: var(--brand-accent);
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.benefit-list p {
    color: rgba(255,255,255,0.8);
    font-size: 0.9rem;
    margin-top: 0.25rem;
}

/* Target Users */
.user-chip-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.user-chip {
    background-color: var(--bg-main);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 500;
    position: relative;
    overflow: hidden;
}

.user-chip i {
    font-size: 1.5rem;
    color: var(--brand-primary);
}

.border-accent {
    border-color: var(--brand-accent);
}

.chip-label {
    position: absolute;
    top: 4px;
    left: 8px;
    font-size: 0.65rem;
    text-transform: uppercase;
    color: var(--text-muted);
    letter-spacing: 0.05em;
}

.erp-tech {
    font-weight: 700;
    color: var(--brand-primary);
    margin-top: 10px;
}

/* =========================================
   Pilot CTA
   ========================================= */
.cta-section {
    position: relative;
    margin-top: 2rem;
    margin-bottom: -5rem;
    z-index: 10;
}

.cta-card {
    border-radius: var(--radius-lg);
    padding: 4rem 3rem;
}

.cta-title {
    color: var(--text-white);
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.cta-desc {
    font-size: 1.1rem;
    color: rgba(255,255,255,0.8);
    max-width: 600px;
    margin: 0 auto 2rem;
}

.pilot-benefits {
    display: flex;
    justify-content: center;
    gap: 2rem;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--brand-secondary);
}

.pilot-benefits span {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* =========================================
   Footer
   ========================================= */
.footer {
    padding-top: 8rem; /* Extra padding to account for overlapping CTA */
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 3rem;
}

.footer-links h4 {
    margin-bottom: 1rem;
    font-size: 1rem;
}

.footer-links a {
    display: block;
    margin-bottom: 0.75rem;
    font-size: 0.9rem;
}

.footer-links a:hover {
    color: var(--text-white);
}

.social-links {
    display: flex;
    gap: 1rem;
    font-size: 1.5rem;
}

.social-links a:hover {
    color: var(--text-white);
}

/* =========================================
   Responsive Adjustments
   ========================================= */
@media (max-width: 992px) {
    .grid-4, .grid-half { grid-template-columns: 1fr; }
    .hero-title { font-size: 2.5rem; }
    .process-flow { flex-direction: column; gap: 2rem; }
    .step-connector { display: none; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
    .nav-links { display: none; }
    .hero-cta { flex-direction: column; }
    .ui-table-container { padding-bottom: 1rem; }
    .footer-grid { grid-template-columns: 1fr; }
    .pilot-benefits { flex-direction: column; gap: 1rem; align-items: center; }
}